Visual performance after the implantation of a new trifocal intraocular lens

Jérôme C Vryghem, Steven Heireman, Jérôme C Vryghem, Steven Heireman

Abstract

Purpose: To evaluate the subjective and objective visual results after the implantation of a new trifocal diffractive intraocular lens.

Methods: A NEW TRIFOCAL DIFFRACTIVE INTRAOCULAR LENS WAS DESIGNED COMBINING TWO SUPERIMPOSED DIFFRACTIVE PROFILES: one with +1.75 diopters (D) addition for intermediate vision and the other with +3.50 D addition for near vision. Fifty eyes of 25 patients that were operated on by one surgeon are included in this study. The uncorrected and best distance-corrected monocular and binocular, near, intermediate, and distance visual acuities, contrast sensitivity, and defocus curves were measured 6 months postoperatively. In addition to the standard clinical follow-up, a questionnaire evaluating individual satisfaction and quality of life was submitted to the patients.

Results: The mean age of patients at the time of surgery was 70 ± 10 years. The mean uncorrected and corrected monocular distance visual acuity (VA) were LogMAR 0.06 ± 0.10 and LogMAR 0.00 ± 0.08, respectively. The outcomes for the binocular uncorrected distance visual acuity were almost the same (LogMAR -0.04 ± 0.09). LogMAR -010 ± 0.15 and 0.02 ± 0.06 were measured for the binocular uncorrected intermediate and near VA, respectively. The distance-corrected visual acuity was maintained in mesopic conditions. The contrast sensitivity was similar to that obtained after implantation of a bifocal intraocular lens and did not decrease in mesopic conditions. The binocular defocus curve confirms good VA even in the intermediate distance range, with a moderate decrease of less than LogMAR 0.2 at -1.5 D, with respect to the best distance VA at 0 D defocus. Patient satisfaction was high. No discrepancy between the objective and subjective outcomes was evidenced.

Conclusion: The introduction of a third focus in diffractive multifocal intraocular lenses improves the intermediate vision with minimal visual discomfort for the patient.

Keywords: diffractive multifocal; lens implantation; third focus; trifocal diffractive intraocular lens.

Figures

Figure 1
Figure 1
Image of the FineVision (PhysIOL, Liège, Belgium) intraocular lens.
Figure 2
Figure 2
Distribution of the spherical equivalent: percentage of eyes with respect to the achieved spherical equivalent.
Figure 3
Figure 3
Average binocular defocus curve with distance correction. Abbreviations: MAR, minimum angular resolution; D, diopters.
Figure 4
Figure 4
Monocular contrast sensitivity outcomes with CVS-1000 (VectorVision, Greenville, SC, USA) in photopic and mesopic conditions.
Figure 5
Figure 5
Scores obtained from the questionnaire addressed to the patients 1 to 2 months after surgery.

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Source: PubMed

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